[DUPLICATE] What is the difference between void main() and int main()

Question

How void main() and int main() works.

Answer 1

main is a fuction...
a function may return something...
eg..a char..a int...a float...an array...another function...etc

void main()...suggests main() wont return anything

inn main suggests...it will return a integer value...

thats why we write return 0 at the end...
for main...in general u can use any between int and void...

Answer 2

We return 0 when the programs ends like it should.
We return -1 when it ends unexpectedly because of an exception.

Those are conventions. We can actually return whatever integer we want.

We can define our own error codes when a program ends.
If we have a huge program (parent process) with multiple child processes, we can let a child process do a specific calculation and collect its return value like it's a normal function in the parent class.

While learning C++, the return value of the main function usually doesn't matter a lot. Still, using int main() and returning 0 (in most compilers you don't even have to write this line) is good practice.